Alot of the time it’s just a browser cache issue, with chrome’s inspector theirs a cool little checkbox under the settings (The cog wheel) that says “Disable cache (while DevTools is open)” to guarantee your cache never gives you an issue.

Please note that editing theme files directly (which includes via Editor in dashboard) is not advisable, those changes will be lost during theme update! You should go with either CSS Manager plugin for CSS only edits or a child theme for more advanced mods.